Stable aluminum construction Made from a high-strength aluminum alloy, this fret leveling block delivers exceptional durability and wear resistance for reliable use in fret leveling tasks on guitars and basses. Easy fret leveling adjustments Precisely level frets and easily adjust fretboard radii, helping musicians achieve optimal playability on their guitars or basses. Two radius options in one tool The design includes two different radii in one tool, providing flexibility and efficiency when working on different fretboard profiles. Applications - Routine setup and maintenance: level frets for consistent action and smooth playability on guitars or basses. - Radius-specific work: switch radii to match the instrument’s fretboard profile during setup or adjustments. - Post-refret or neck prep: use to ensure even fret heights with the appropriate radius after fret work.